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Homework Help: Half life and temperature

  1. Jun 21, 2015 #1
    1. The
    Lead is the final decay product of uranium-238 (half life = 4.7 billion years), so often the

    uranium is embedded in lead. The decay of 1.00 g of uranium to thorium converts

    6.83x10-8 kg of mass to energy. Assuming the uranium absorbs none of the heat, what

    would be the temperature change of 120.0 kg of lead surrounding 1.00 g of uranium after

    3.8 million years?

    2. Relevant equations
    e=mc^2
    mf=mi(0.5)^t/h

    3. The attempt at a solution
    i got a really unreasonable answer; 394 035 degrees celcius
     
  2. jcsd
  3. Jun 21, 2015 #2

    phinds

    User Avatar
    Gold Member

    Be helpful if you showed HOW you got that result.
     
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